On 11/28/17, from 2am to 6am PST, BitTitan will shut down all web traffic to Manage.BitTitan.com and MigrationWiz.com (MSPComplete and MigrationWiz). While there will be no access at this time, migrations in progress should not be disrupted.
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Option 2: You can use Autodiscover to import your Public Folders from your Source Exchange 2007+ server.

In this case, you can pick and choose which Public Folders to migrate, by clicking on the checkbox next to the Public Folder name. However, you will be billed for each top-level folder that is migrated.